Pro/Forums - View Single Post - What is the difference between an endmill and a drillbit?

Fixittt · 12-07-2002, 02:03 PM

Well here is a break down.

Brill bits are designed for downward forces. The tip is designed for cutting. The flutes on the edges of a drill bit are primaraly moging matarial away. The cutting edges are for braking the martial and letting it fly away. Drill bits are really flexable. And will break very easy with sideways force.

Endmills are primaraly exactly oposite. Designed for sideways cutting. I dont care what people say, Endmills are not for drilling. Sure you can do it. But its not really made for it.

That is the run down.

Also I should mention that a drill press can be used to hold endmills and cut metal. But remember the drill press is designed for downward forces as well, the bearings in the quill are not designed for sideways forces. Also a drill chuck will never give y ou good results if you are trying to persision machine something.

They have alot of runout in them.

I just got my big manual mill, and it is a whole lot different then what I am used to. So I have a learning experiance ahead of me.

Peace

Edit:

As mentioned above..... NEVER EVER EVER hold a peice of material in your hand and try to use an endmill in a drill pres to cut it. If you do, you desirve to loose a finger. Remember that the endmill is chewing thure metal, your flesh and bone will not stop it at all. Also when the cutter bites into the matirial there is alot of force behind it. Most of the time it will rip the material right out of your hands. And will probably take flesh with it. Please do not do this. If you must use a drill press to machine with, Then I highly recomend spening about $30 to get a small Vise with the X and Y slides build into it. I have one. Its is nothing persision or anything But it will hold the metal and has small crank wheels to move the vise.

Ok im done.

12-07-2002, 02:03 PM	#4
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	Well here is a break down. Brill bits are designed for downward forces. The tip is designed for cutting. The flutes on the edges of a drill bit are primaraly moging matarial away. The cutting edges are for braking the martial and letting it fly away. Drill bits are really flexable. And will break very easy with sideways force. Endmills are primaraly exactly oposite. Designed for sideways cutting. I dont care what people say, Endmills are not for drilling. Sure you can do it. But its not really made for it. That is the run down. Also I should mention that a drill press can be used to hold endmills and cut metal. But remember the drill press is designed for downward forces as well, the bearings in the quill are not designed for sideways forces. Also a drill chuck will never give y ou good results if you are trying to persision machine something. They have alot of runout in them. I just got my big manual mill, and it is a whole lot different then what I am used to. So I have a learning experiance ahead of me. Peace Edit: As mentioned above..... NEVER EVER EVER hold a peice of material in your hand and try to use an endmill in a drill pres to cut it. If you do, you desirve to loose a finger. Remember that the endmill is chewing thure metal, your flesh and bone will not stop it at all. Also when the cutter bites into the matirial there is alot of force behind it. Most of the time it will rip the material right out of your hands. And will probably take flesh with it. Please do not do this. If you must use a drill press to machine with, Then I highly recomend spening about $30 to get a small Vise with the X and Y slides build into it. I have one. Its is nothing persision or anything But it will hold the metal and has small crank wheels to move the vise. Ok im done. __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808 Last edited by Fixittt; 12-07-2002 at 02:09 PM.